perf/x86/amd: Set the size of event map array to PERF_COUNT_HW_MAX
authorAdam Borowski <kilobyte@angband.pl>
Wed, 27 Apr 2016 09:35:31 +0000 (11:35 +0200)
committerIngo Molnar <mingo@kernel.org>
Thu, 28 Apr 2016 08:20:25 +0000 (10:20 +0200)
commit0a25556f84d5f79e68e9502bb1f32a43377ab2bf
treeaa095915827dd3996e66efa4c968c5842d72c35a
parentb303e7c15d53cd8ef6b349b702e07eee3f102792
perf/x86/amd: Set the size of event map array to PERF_COUNT_HW_MAX

The entry for PERF_COUNT_HW_REF_CPU_CYCLES is not used on AMD, but is
referenced by filter_events() which expects undefined events to have a
value of 0.

Found via KASAN:

  UBSAN: Undefined behaviour in arch/x86/events/amd/core.c:132:30
  index 9 is out of range for type 'u64 [9]'
  UBSAN: Undefined behaviour in arch/x86/events/amd/core.c:132:9
  load of address ffffffff81c021c8 with insufficient space for an object of type 'const u64'

Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/1461749731-30979-1-git-send-email-kilobyte@angband.pl
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/events/amd/core.c